Browsing by Author "Fernández Francos, Xavier"
Now showing items 1-20 of 107
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3D printable hybrid acrylate-epoxy dynamic networks
Casado Gómez, Jaime; Konuray, Ali Osman; Roig Gibert, Adriá; Fernández Francos, Xavier; Ramis Juan, Xavier (Elsevier, 2022-06)
Article
Open AccessPolymer networks with dynamic bonds, also known as covalent adaptable networks (CANs) combine the superior mechanical properties and chemical resistance of thermosets with the ability to be reprocessed, a feat formerly ... -
A new two-stage curing system: Thiol-ene/epoxy homopolymerization using an allyl terminated hyperbranched polyester as reactive modifier
Flores Guillen, Marjorie; Tomuta, Adrian Marius; Fernández Francos, Xavier; Sangermano, Marco; Serra Albet, Maria Àngels; Ramis Juan, Xavier (Elsevier, 2013-10-04)
Article
Restricted access - publisher's policyAn allyl terminated hyperbranched polyester (HBP) was added to an epoxy formulation containing a trithiol compound to perform a thiol-ene click reaction. By this procedure a flexible thioether network was formed. The ... -
Acetoacetate based thermosets prepared by dual-Michael addition reactions
Konuray, Ali Osman; Fernández Francos, Xavier; Ramis Juan, Xavier; Serra Albet, Maria Àngels (Multidisciplinary Digital Publishing Institute (MDPI), 2019-01-01)
Article
Open AccessA novel set of dual-curable multiacetoacetate-multiacrylate-divinyl sulfone ternary materials with versatile and manipulable properties are presented. In contrast to common dual-curing systems, the first stage polymer ... -
Analysis of the reaction mechanism of the thiol-epoxy addition initiated by nucleophilic tertiary amines
Osman Konuray, Ali; Fernández Francos, Xavier; Ramis Juan, Xavier (2017-10-14)
Article
Open AccessA kinetic model for thiol–epoxy crosslinking initiated by tertiary amines has been proposed. The kinetic model is based on mechanistic considerations and it features the effect of the initiator, hydroxyl content, and ... -
Characterization of sequential dual-curing of thiol-acrylate-epoxy systems with controlled thermal properties
Russo, Claudio; Serra Albet, Maria Àngels; Fernández Francos, Xavier; Flor López, Sílvia de la (Elsevier, 2019-03-01)
Article
Open AccessIn this work, a novel sequential dual-curing system based on thiol-acrylate-epoxy formulations is developed and characterized. Both reaction stages are thermally activated and sequentially relies on difference in the ... -
Click-based dual-curing thermosets and their applications
Ramis Juan, Xavier; Fernández Francos, Xavier; Flor López, Sílvia de la; Ferrando Piera, Francesc; Serra Albet, Maria Àngels (Elsevier, 2018)
Part of book or chapter of book
Restricted access - publisher's policyDual curing is the methodology for obtaining thermosets by combining two different and compatible polymerization reactions, taking place sequentially or simultaneously. Sequential dual-curing processing enables the preparation ... -
Comparative analysis of stochastic network build-up methods for the curing of epoxy-anhydride thermosets
Fernández Francos, Xavier; Serra Albet, Maria Àngels; Ramis Juan, Xavier (2014-04-01)
Article
Restricted access - publisher's policyThe network build-up of epoxy-anhydride thermosets has been studied using two different stochastic network build-up methods based on the random combination of primary chains or simple fragments. Explicit expressions for ... -
Comparative curing kinetics and thermal–mechanical properties of DGEBA thermosets cured with a hyperbranched poly(ethyleneimine) and an aliphatic triamine
Santiago, David; Fernández Francos, Xavier; Ramis Juan, Xavier; Salla Tarragó, José María; Sangermano, Marco (2011-11-10)
Article
Restricted access - publisher's policyThe use of commercially available hyperbranched poly(ethyleneimine)s (Hbpei, LupasolTM, BASF) as curing agent of DGEBA has been studied. HBpei can react with epoxy monomers by an epoxy-amine condensation mechanism and get ... -
Controlled composite processing based on off-stoichiometric thiol-epoxy dual-curing systems with sequential heat release (SHR)
Fabregat Sanjuan, Albert; Fernández Francos, Xavier; Ferrando Piera, Francesc (Wiley, 2021-01-01)
Article
Open AccessControl of curing rate and exothermicity during processing of thermosetting composite materials is essential in order to minimize the formation of internal stresses leading to mechanical and dimensional defects in the ... -
Corrigendum: Network structure and thermomechanical properties of hybrid DGEBA networks cured with 1-methylimidazole and hyperbranched poly(ethyleneimine)s
Fernández Francos, Xavier; Santiago, David; Ferrando Piera, Francesc; Ramis Juan, Xavier; Salla Tarragó, José María; Serra Albet, Maria Àngels; Sangermano, Marco (2013-01-25)
Article
Restricted access - publisher's policy -
Cost-effectively 3d-printed rigid and versatile interpenetrating polymer networks
Konuray, Ali Osman; Bonada Bo, Jordi; Tercjak, Agnieszka; Fabregat Sanjuan, Albert; Fernández Francos, Xavier; Ramis Juan, Xavier (Multidisciplinary Digital Publishing Institute (MDPI), 2021-08-02)
Article
Open AccessVersatile acrylate–epoxy hybrid formulations are becoming widespread in photo/thermal dual-processing scenarios, especially in 3D printing applications. Usually, parts are printed in a stereolithography or digital light ... -
Crosslinking of mixtures of DGEBA with 1,6-Dioxaspiro[4,4]nonan-2,7-dione initiated by tertiary amines. I. Study of the reaction and kinetic analysis
Fernández Francos, Xavier; Salla Tarragó, José María; Mantecón, Ana; Serra Albet, Maria Àngels; Ramis Juan, Xavier (2008-08)
Article
Restricted access - publisher's policyThe anionic copolymerization of a Diglycidyl ether of bisphenol A (DGEBA) epoxy resin and a bislactone has been studied with different initiators. The kinetics of the process has been dealt with in detail, and it has ... -
Crosslinking of mixtures of DGEBA with 1,6-dioxaspiro[4,4]nonan-2,7-dione initiated by tertiary amines. Part IV. Effect of hydroxyl groups on initiation and curing kinetics
Fernández Francos, Xavier; Cook, Wayne D.; Serra Albet, Maria Àngels; Ramis Juan, Xavier; Liang, Genhai G.; Salla Tarragó, José María (Elsevier, 2010-01-06)
Article
Restricted access - publisher's policyThe anionic homopolymerization of DGEBA epoxy resin and its anionic copolymerization with a bislactone was studied using two alternative tertiary amines, 1-methylimidazole (1MI) and dimethylaminopyridine (DMAP) as initiators. ... -
Crosslinking of mixtures of diglycidylether of bisphenol-A with 1,6-dioxaspiro[4.4] nonan-2,7-dione initiated by tertiary amines: III. Effect of hydroxyl groups on network formation
Fernández Francos, Xavier; Cook, Wayne D.; Salla Tarragó, José María; Serra Albet, Maria Àngels; Ramis Juan, Xavier (2009-12)
Article
Restricted access - publisher's policy -
Curado “Click” secuencial de mezclas tiol-acetoacetato-acrilato, catalizada por una fotobase latente
Ramis Juan, Xavier; Konuray, Ali Osman; Liendo Castillo, Freddy Jesus; Fernández Francos, Xavier; Morancho Llena, José María; Salla Tarragó, José María; Serra Albet, Maria Àngels (2016)
Conference lecture
Restricted access - publisher's policy -
Curat tèrmic i fotocurat de resines epoxi per al control químic de la contracció i millora de la degradabilitat
Fernández Francos, Xavier (Universitat Politècnica de Catalunya, 2009-07-10)
Doctoral thesis
Open AccessS’ha estudiat la copolimerització de resines epoxi amb una spirobislactona com a comonòmer per tal de controlar la contracció química durant el curat i millorar la seva degradabilitat per tal d’afavorir la seva recuperació ... -
Cure kinetics modeling and thermomechanical properties of cycloaliphatic epoxy-anhydride thermosets modified with hyperstar polymers
Belmonte, Alberto; Daebritz, Frank; Ramis Juan, Xavier; Serra Albet, Maria Àngels; Void, Brigitte; Fernández Francos, Xavier (2014-09-15)
Article
Restricted access - publisher's policyHyperstar polymers (HSPs) with hyperbranched aromatic polyester core and arms consisting of block copolymers of poly(methyl methacrylate) and poly(hydroxyethyl methacrylate) have been used as polymeric modifiers in ... -
Curing and thermomechanical properties of off-stoichiometric anhydride-epoxy thermosets
Morancho Llena, José María; Ramis Juan, Xavier; Fernández Francos, Xavier; Salla Tarragó, José María; Konuray, Ali Osman; Serra Albet, Maria Àngels (Springer, 2019-11)
Article
Open Accessn the present work, we report the preparation and characterization of a new family of thermosets based on off-stoichiometric anhydride–epoxy formulations in the presence of an anionic initiator. Diglycidyl ether of bisphenol ... -
Curing kinetics and characterization of dual-curable thiol-acrylate-epoxy thermosets with latent reactivity
Konuray, Ali Osman; Fernández Francos, Xavier; Ramis Juan, Xavier (2018-01)
Article
Open AccessA new dual-curing scheme was developed for thiol-acrylate-epoxy mixtures. A photo-initiated latent catalytic system was used to carry out thiol-acrylate Michael addition at 35 °C (Stage 1) followed by thiol-epoxy click ... -
Curing kinetics of acrylate-based and 3D printable IPNs
Konuray, Ali Osman; Salla Tarragó, José María; Morancho Llena, José María; Fernández Francos, Xavier; García Álvarez, Montserrat; Ramis Juan, Xavier (2020-10-01)
Article
Open AccessIn this work, the kinetics of curing of a new family of interpenetrating polymer networks (IPNs) obtained by co-formulation of a photocurable acrylic resin with a thermocurable epoxy/anhydride mixture is studied. The first ...